The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 1990
Filed:
Apr. 20, 1989
Applicant:
Inventors:
Albert F Harrington, Claymont, DE (US);
Robert R Krebs, Hockessin, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03H / ;
U.S. Cl.
CPC ...
350-365 ; 350-369 ;
Abstract
This invention relates to a method and apparatus for making transmission holograms and, more specifically, using a rotatable drum adapted to receive a beam of actinic radiation on a reflector in the drum reflecting a portion of the beam through a master to a recording medium to form the transmission hologram in the recording medium.